SEKOIA_Apt_Gamaredon_Subtle_Paws

rule SEKOIA_Apt_Gamaredon_Subtle_Paws : FILE
{
	meta:
		description = "SUBTLE-PAWS powershell backdoor used by Gamaredon"
		author = "Sekoia.io"
		id = "1950f886-97d2-4aa1-8f13-2947eba706e4"
		date = "2024-02-09"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_gamaredon_subtle_paws.yar#L1-L18"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "2fcebcf3401912e06ca4a34bf4e8d5318c6b2e08b00c4939ab932f3fb94cbc89"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "$splitter" ascii wide
		$s2 = "[System.Convert]::FromBase64String" ascii wide
		$s3 = "$_;$var2 =\"var1\";$var3" ascii wide
		$s4 = "foreach-object{$_|powershell -noprofile -}" ascii wide

	condition:
		$s1 and $s2 and ( $s3 or $s4 ) and filesize < 100KB
}